diff --git a/examples/companion_radio/MyMesh.cpp b/examples/companion_radio/MyMesh.cpp
index 9bb747e7..f8e90be5 100644
--- a/examples/companion_radio/MyMesh.cpp
+++ b/examples/companion_radio/MyMesh.cpp
@@ -838,7 +838,7 @@ void MyMesh::begin(bool has_display) {
   _prefs.bw = constrain(_prefs.bw, 7.8f, 500.0f);
   _prefs.sf = constrain(_prefs.sf, 5, 12);
   _prefs.cr = constrain(_prefs.cr, 5, 8);
-  _prefs.tx_power_dbm = constrain(_prefs.tx_power_dbm, 1, MAX_LORA_TX_POWER);
+  _prefs.tx_power_dbm = constrain(_prefs.tx_power_dbm, -9, MAX_LORA_TX_POWER);
   _prefs.gps_enabled = constrain(_prefs.gps_enabled, 0, 1);  // Ensure boolean 0 or 1
   _prefs.gps_interval = constrain(_prefs.gps_interval, 0, 86400);  // Max 24 hours
 
diff --git a/examples/companion_radio/NodePrefs.h b/examples/companion_radio/NodePrefs.h
index 62cd4164..d7ddd92a 100644
--- a/examples/companion_radio/NodePrefs.h
+++ b/examples/companion_radio/NodePrefs.h
@@ -17,7 +17,7 @@ struct NodePrefs {  // persisted to file
   uint8_t multi_acks;
   uint8_t manual_add_contacts;
   float bw;
-  uint8_t tx_power_dbm;
+  int8_t tx_power_dbm;
   uint8_t telemetry_mode_base;
   uint8_t telemetry_mode_loc;
   uint8_t telemetry_mode_env;
diff --git a/examples/simple_repeater/MyMesh.cpp b/examples/simple_repeater/MyMesh.cpp
index 6d957cc0..8220ef0d 100644
--- a/examples/simple_repeater/MyMesh.cpp
+++ b/examples/simple_repeater/MyMesh.cpp
@@ -899,7 +899,7 @@ void MyMesh::dumpLogFile() {
   }
 }
 
-void MyMesh::setTxPower(uint8_t power_dbm) {
+void MyMesh::setTxPower(int8_t power_dbm) {
   radio_set_tx_power(power_dbm);
 }
 
diff --git a/examples/simple_repeater/MyMesh.h b/examples/simple_repeater/MyMesh.h
index 0d5cd28a..7a51b4a9 100644
--- a/examples/simple_repeater/MyMesh.h
+++ b/examples/simple_repeater/MyMesh.h
@@ -198,7 +198,7 @@ public:
   }
 
   void dumpLogFile() override;
-  void setTxPower(uint8_t power_dbm) override;
+  void setTxPower(int8_t power_dbm) override;
   void formatNeighborsReply(char *reply) override;
   void removeNeighbor(const uint8_t* pubkey, int key_len) override;
   void formatStatsReply(char *reply) override;
diff --git a/examples/simple_room_server/MyMesh.cpp b/examples/simple_room_server/MyMesh.cpp
index 22a3d208..598b14de 100644
--- a/examples/simple_room_server/MyMesh.cpp
+++ b/examples/simple_room_server/MyMesh.cpp
@@ -719,7 +719,7 @@ void MyMesh::dumpLogFile() {
   }
 }
 
-void MyMesh::setTxPower(uint8_t power_dbm) {
+void MyMesh::setTxPower(int8_t power_dbm) {
   radio_set_tx_power(power_dbm);
 }
 
diff --git a/examples/simple_room_server/MyMesh.h b/examples/simple_room_server/MyMesh.h
index f470e55e..b4529e77 100644
--- a/examples/simple_room_server/MyMesh.h
+++ b/examples/simple_room_server/MyMesh.h
@@ -188,7 +188,7 @@ public:
   }
 
   void dumpLogFile() override;
-  void setTxPower(uint8_t power_dbm) override;
+  void setTxPower(int8_t power_dbm) override;
 
   void formatNeighborsReply(char *reply) override {
     strcpy(reply, "not supported");
diff --git a/examples/simple_secure_chat/main.cpp b/examples/simple_secure_chat/main.cpp
index 018ec2a2..a389ec74 100644
--- a/examples/simple_secure_chat/main.cpp
+++ b/examples/simple_secure_chat/main.cpp
@@ -66,7 +66,7 @@ struct NodePrefs {  // persisted to file
   char node_name[32];
   double node_lat, node_lon;
   float freq;
-  uint8_t tx_power_dbm;
+  int8_t tx_power_dbm;
   uint8_t unused[3];
 };
 
@@ -290,7 +290,7 @@ public:
   }
 
   float getFreqPref() const { return _prefs.freq; }
-  uint8_t getTxPowerPref() const { return _prefs.tx_power_dbm; }
+  int8_t getTxPowerPref() const { return _prefs.tx_power_dbm; }
 
   void begin(FILESYSTEM& fs) {
     _fs = &fs;
diff --git a/examples/simple_sensor/SensorMesh.cpp b/examples/simple_sensor/SensorMesh.cpp
index 8e27323e..f05fb245 100644
--- a/examples/simple_sensor/SensorMesh.cpp
+++ b/examples/simple_sensor/SensorMesh.cpp
@@ -815,7 +815,7 @@ void SensorMesh::updateFloodAdvertTimer() {
   }
 }
 
-void SensorMesh::setTxPower(uint8_t power_dbm) {
+void SensorMesh::setTxPower(int8_t power_dbm) {
   radio_set_tx_power(power_dbm);
 }
 
diff --git a/examples/simple_sensor/SensorMesh.h b/examples/simple_sensor/SensorMesh.h
index ed352345..4bc0d784 100644
--- a/examples/simple_sensor/SensorMesh.h
+++ b/examples/simple_sensor/SensorMesh.h
@@ -66,7 +66,7 @@ public:
   void setLoggingOn(bool enable) override {  }
   void eraseLogFile() override { }
   void dumpLogFile() override { }
-  void setTxPower(uint8_t power_dbm) override;
+  void setTxPower(int8_t power_dbm) override;
   void formatNeighborsReply(char *reply) override {
     strcpy(reply, "not supported");
   }
diff --git a/src/helpers/CommonCLI.cpp b/src/helpers/CommonCLI.cpp
index 10ab8669..6dcf7018 100644
--- a/src/helpers/CommonCLI.cpp
+++ b/src/helpers/CommonCLI.cpp
@@ -92,7 +92,7 @@ void CommonCLI::loadPrefsInt(FILESYSTEM* fs, const char* filename) {
     _prefs->bw = constrain(_prefs->bw, 7.8f, 500.0f);
     _prefs->sf = constrain(_prefs->sf, 5, 12);
     _prefs->cr = constrain(_prefs->cr, 5, 8);
-    _prefs->tx_power_dbm = constrain(_prefs->tx_power_dbm, 1, 30);
+    _prefs->tx_power_dbm = constrain(_prefs->tx_power_dbm, -9, 30);
     _prefs->multi_acks = constrain(_prefs->multi_acks, 0, 1);
     _prefs->adc_multiplier = constrain(_prefs->adc_multiplier, 0.0f, 10.0f);
 
@@ -326,7 +326,7 @@ void CommonCLI::handleCommand(uint32_t sender_timestamp, const char* command, ch
         }
         *reply = 0;  // set null terminator
       } else if (memcmp(config, "tx", 2) == 0 && (config[2] == 0 || config[2] == ' ')) {
-        sprintf(reply, "> %d", (uint32_t) _prefs->tx_power_dbm);
+        sprintf(reply, "> %d", (int32_t) _prefs->tx_power_dbm);
       } else if (memcmp(config, "freq", 4) == 0) {
         sprintf(reply, "> %s", StrHelper::ftoa(_prefs->freq));
       } else if (memcmp(config, "public.key", 10) == 0) {
diff --git a/src/helpers/CommonCLI.h b/src/helpers/CommonCLI.h
index 8661d1e6..146e1c6e 100644
--- a/src/helpers/CommonCLI.h
+++ b/src/helpers/CommonCLI.h
@@ -19,7 +19,7 @@ struct NodePrefs { // persisted to file
   double node_lat, node_lon;
   char password[16];
   float freq;
-  uint8_t tx_power_dbm;
+  int8_t tx_power_dbm;
   uint8_t disable_fwd;
   uint8_t advert_interval;       // minutes / 2
   uint8_t flood_advert_interval; // hours
@@ -67,7 +67,7 @@ public:
   virtual void setLoggingOn(bool enable) = 0;
   virtual void eraseLogFile() = 0;
   virtual void dumpLogFile() = 0;
-  virtual void setTxPower(uint8_t power_dbm) = 0;
+  virtual void setTxPower(int8_t power_dbm) = 0;
   virtual void formatNeighborsReply(char *reply) = 0;
   virtual void removeNeighbor(const uint8_t* pubkey, int key_len) {
     // no op by default
diff --git a/variants/ebyte_eora_s3/target.cpp b/variants/ebyte_eora_s3/target.cpp
index 647f5997..501f560b 100644
--- a/variants/ebyte_eora_s3/target.cpp
+++ b/variants/ebyte_eora_s3/target.cpp
@@ -75,7 +75,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/ebyte_eora_s3/target.h b/variants/ebyte_eora_s3/target.h
index f184c757..892c3de3 100644
--- a/variants/ebyte_eora_s3/target.h
+++ b/variants/ebyte_eora_s3/target.h
@@ -25,5 +25,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/generic-e22/target.cpp b/variants/generic-e22/target.cpp
index e0253779..f76bb979 100644
--- a/variants/generic-e22/target.cpp
+++ b/variants/generic-e22/target.cpp
@@ -38,7 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/generic-e22/target.h b/variants/generic-e22/target.h
index 442706f3..5ad13054 100644
--- a/variants/generic-e22/target.h
+++ b/variants/generic-e22/target.h
@@ -17,5 +17,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/generic_espnow/target.cpp b/variants/generic_espnow/target.cpp
index 6b5d4e44..f42085c0 100644
--- a/variants/generic_espnow/target.cpp
+++ b/variants/generic_espnow/target.cpp
@@ -25,7 +25,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   // no-op
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio_driver.setTxPower(dbm);
 }
 
diff --git a/variants/generic_espnow/target.h b/variants/generic_espnow/target.h
index 99b6f577..1ebd0837 100644
--- a/variants/generic_espnow/target.h
+++ b/variants/generic_espnow/target.h
@@ -12,5 +12,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_ct62/target.cpp b/variants/heltec_ct62/target.cpp
index a8c15f5f..5cc621a1 100644
--- a/variants/heltec_ct62/target.cpp
+++ b/variants/heltec_ct62/target.cpp
@@ -27,7 +27,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_ct62/target.h b/variants/heltec_ct62/target.h
index 9639ab2d..34130ae7 100644
--- a/variants/heltec_ct62/target.h
+++ b/variants/heltec_ct62/target.h
@@ -16,5 +16,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/heltec_e213/target.cpp b/variants/heltec_e213/target.cpp
index 23561850..c9233431 100644
--- a/variants/heltec_e213/target.cpp
+++ b/variants/heltec_e213/target.cpp
@@ -44,7 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_e213/target.h b/variants/heltec_e213/target.h
index 9ecdc212..14969c0f 100644
--- a/variants/heltec_e213/target.h
+++ b/variants/heltec_e213/target.h
@@ -25,5 +25,5 @@ extern MomentaryButton user_btn;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/heltec_e290/target.cpp b/variants/heltec_e290/target.cpp
index 92b02092..b0c9630c 100644
--- a/variants/heltec_e290/target.cpp
+++ b/variants/heltec_e290/target.cpp
@@ -44,7 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_e290/target.h b/variants/heltec_e290/target.h
index 60770112..5d423fc0 100644
--- a/variants/heltec_e290/target.h
+++ b/variants/heltec_e290/target.h
@@ -25,5 +25,5 @@ extern MomentaryButton user_btn;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/heltec_mesh_solar/target.cpp b/variants/heltec_mesh_solar/target.cpp
index ad79f717..9852b68f 100644
--- a/variants/heltec_mesh_solar/target.cpp
+++ b/variants/heltec_mesh_solar/target.cpp
@@ -34,7 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_mesh_solar/target.h b/variants/heltec_mesh_solar/target.h
index e301a273..f1921abf 100644
--- a/variants/heltec_mesh_solar/target.h
+++ b/variants/heltec_mesh_solar/target.h
@@ -42,5 +42,5 @@ extern SolarSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_t114/target.cpp b/variants/heltec_t114/target.cpp
index c3341103..160d00b6 100644
--- a/variants/heltec_t114/target.cpp
+++ b/variants/heltec_t114/target.cpp
@@ -36,7 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_t114/target.h b/variants/heltec_t114/target.h
index 6306cd69..187675e9 100644
--- a/variants/heltec_t114/target.h
+++ b/variants/heltec_t114/target.h
@@ -50,5 +50,5 @@ extern T114SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_t190/target.cpp b/variants/heltec_t190/target.cpp
index b9357594..d22f8b8c 100644
--- a/variants/heltec_t190/target.cpp
+++ b/variants/heltec_t190/target.cpp
@@ -44,7 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_t190/target.h b/variants/heltec_t190/target.h
index 8a5fc716..83e03570 100644
--- a/variants/heltec_t190/target.h
+++ b/variants/heltec_t190/target.h
@@ -25,5 +25,5 @@ extern MomentaryButton user_btn;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/heltec_tracker/target.cpp b/variants/heltec_tracker/target.cpp
index 5ba9a8fb..25c2634b 100644
--- a/variants/heltec_tracker/target.cpp
+++ b/variants/heltec_tracker/target.cpp
@@ -47,7 +47,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_tracker/target.h b/variants/heltec_tracker/target.h
index 23fab16e..5296fb2c 100644
--- a/variants/heltec_tracker/target.h
+++ b/variants/heltec_tracker/target.h
@@ -43,5 +43,5 @@ extern HWTSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_tracker_v2/target.cpp b/variants/heltec_tracker_v2/target.cpp
index da397fb7..c2e26b20 100644
--- a/variants/heltec_tracker_v2/target.cpp
+++ b/variants/heltec_tracker_v2/target.cpp
@@ -50,7 +50,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_tracker_v2/target.h b/variants/heltec_tracker_v2/target.h
index 190404ef..5b799e78 100644
--- a/variants/heltec_tracker_v2/target.h
+++ b/variants/heltec_tracker_v2/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_v2/target.cpp b/variants/heltec_v2/target.cpp
index df71d3f4..c5a04752 100644
--- a/variants/heltec_v2/target.cpp
+++ b/variants/heltec_v2/target.cpp
@@ -43,7 +43,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_v2/target.h b/variants/heltec_v2/target.h
index 48d750be..788dac72 100644
--- a/variants/heltec_v2/target.h
+++ b/variants/heltec_v2/target.h
@@ -25,5 +25,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_v3/target.cpp b/variants/heltec_v3/target.cpp
index 78b88197..cdd2535e 100644
--- a/variants/heltec_v3/target.cpp
+++ b/variants/heltec_v3/target.cpp
@@ -50,7 +50,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_v3/target.h b/variants/heltec_v3/target.h
index 739aecfe..21a209f9 100644
--- a/variants/heltec_v3/target.h
+++ b/variants/heltec_v3/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_v4/target.cpp b/variants/heltec_v4/target.cpp
index 0d2bd497..f971cc60 100644
--- a/variants/heltec_v4/target.cpp
+++ b/variants/heltec_v4/target.cpp
@@ -50,7 +50,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_v4/target.h b/variants/heltec_v4/target.h
index 00d2adab..5016588d 100644
--- a/variants/heltec_v4/target.h
+++ b/variants/heltec_v4/target.h
@@ -30,5 +30,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/heltec_wireless_paper/target.cpp b/variants/heltec_wireless_paper/target.cpp
index dd2d51c0..06f548fc 100644
--- a/variants/heltec_wireless_paper/target.cpp
+++ b/variants/heltec_wireless_paper/target.cpp
@@ -43,7 +43,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/heltec_wireless_paper/target.h b/variants/heltec_wireless_paper/target.h
index b89c486f..65739e77 100644
--- a/variants/heltec_wireless_paper/target.h
+++ b/variants/heltec_wireless_paper/target.h
@@ -25,5 +25,5 @@ extern MomentaryButton user_btn;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/ikoka_handheld_nrf/target.cpp b/variants/ikoka_handheld_nrf/target.cpp
index efa6669f..48244e17 100644
--- a/variants/ikoka_handheld_nrf/target.cpp
+++ b/variants/ikoka_handheld_nrf/target.cpp
@@ -36,7 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/ikoka_handheld_nrf/target.h b/variants/ikoka_handheld_nrf/target.h
index a28ca81a..d4af956e 100644
--- a/variants/ikoka_handheld_nrf/target.h
+++ b/variants/ikoka_handheld_nrf/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/ikoka_nano_nrf/target.cpp b/variants/ikoka_nano_nrf/target.cpp
index aed59182..be20cfb4 100644
--- a/variants/ikoka_nano_nrf/target.cpp
+++ b/variants/ikoka_nano_nrf/target.cpp
@@ -34,7 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/ikoka_nano_nrf/target.h b/variants/ikoka_nano_nrf/target.h
index 9b4e908e..7949ab63 100644
--- a/variants/ikoka_nano_nrf/target.h
+++ b/variants/ikoka_nano_nrf/target.h
@@ -24,5 +24,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/ikoka_stick_nrf/target.cpp b/variants/ikoka_stick_nrf/target.cpp
index bd803399..4f6befc6 100644
--- a/variants/ikoka_stick_nrf/target.cpp
+++ b/variants/ikoka_stick_nrf/target.cpp
@@ -34,7 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/ikoka_stick_nrf/target.h b/variants/ikoka_stick_nrf/target.h
index c276e89f..fab82592 100644
--- a/variants/ikoka_stick_nrf/target.h
+++ b/variants/ikoka_stick_nrf/target.h
@@ -24,5 +24,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/keepteen_lt1/target.cpp b/variants/keepteen_lt1/target.cpp
index e72abf08..e2e183a7 100644
--- a/variants/keepteen_lt1/target.cpp
+++ b/variants/keepteen_lt1/target.cpp
@@ -40,7 +40,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/keepteen_lt1/target.h b/variants/keepteen_lt1/target.h
index 0f1aa756..f2468d34 100644
--- a/variants/keepteen_lt1/target.h
+++ b/variants/keepteen_lt1/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_t3s3/target.cpp b/variants/lilygo_t3s3/target.cpp
index 1c7b3b09..28481188 100644
--- a/variants/lilygo_t3s3/target.cpp
+++ b/variants/lilygo_t3s3/target.cpp
@@ -38,7 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_t3s3/target.h b/variants/lilygo_t3s3/target.h
index f184c757..892c3de3 100644
--- a/variants/lilygo_t3s3/target.h
+++ b/variants/lilygo_t3s3/target.h
@@ -25,5 +25,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_t3s3_sx1276/target.cpp b/variants/lilygo_t3s3_sx1276/target.cpp
index 042ff206..e7fe07a0 100644
--- a/variants/lilygo_t3s3_sx1276/target.cpp
+++ b/variants/lilygo_t3s3_sx1276/target.cpp
@@ -44,7 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_t3s3_sx1276/target.h b/variants/lilygo_t3s3_sx1276/target.h
index 98a0fe35..2df4b3ed 100644
--- a/variants/lilygo_t3s3_sx1276/target.h
+++ b/variants/lilygo_t3s3_sx1276/target.h
@@ -25,5 +25,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/lilygo_tbeam_1w/target.cpp b/variants/lilygo_tbeam_1w/target.cpp
index fcdb42ed..8cb6bdfa 100644
--- a/variants/lilygo_tbeam_1w/target.cpp
+++ b/variants/lilygo_tbeam_1w/target.cpp
@@ -54,7 +54,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tbeam_1w/target.h b/variants/lilygo_tbeam_1w/target.h
index 2c3e8970..99a75031 100644
--- a/variants/lilygo_tbeam_1w/target.h
+++ b/variants/lilygo_tbeam_1w/target.h
@@ -23,5 +23,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_tbeam_SX1262/target.cpp b/variants/lilygo_tbeam_SX1262/target.cpp
index a8caecb3..f85049d7 100644
--- a/variants/lilygo_tbeam_SX1262/target.cpp
+++ b/variants/lilygo_tbeam_SX1262/target.cpp
@@ -45,7 +45,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tbeam_SX1262/target.h b/variants/lilygo_tbeam_SX1262/target.h
index 5f33abb8..e5b3e445 100644
--- a/variants/lilygo_tbeam_SX1262/target.h
+++ b/variants/lilygo_tbeam_SX1262/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_tbeam_SX1276/target.cpp b/variants/lilygo_tbeam_SX1276/target.cpp
index 0a7517a2..5fe82e11 100644
--- a/variants/lilygo_tbeam_SX1276/target.cpp
+++ b/variants/lilygo_tbeam_SX1276/target.cpp
@@ -50,7 +50,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tbeam_SX1276/target.h b/variants/lilygo_tbeam_SX1276/target.h
index b382b652..cd4480dc 100644
--- a/variants/lilygo_tbeam_SX1276/target.h
+++ b/variants/lilygo_tbeam_SX1276/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_tbeam_supreme_SX1262/target.cpp b/variants/lilygo_tbeam_supreme_SX1262/target.cpp
index 8ad306f1..6fec6f58 100644
--- a/variants/lilygo_tbeam_supreme_SX1262/target.cpp
+++ b/variants/lilygo_tbeam_supreme_SX1262/target.cpp
@@ -42,7 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tbeam_supreme_SX1262/target.h b/variants/lilygo_tbeam_supreme_SX1262/target.h
index c6ffa0a6..200a5690 100644
--- a/variants/lilygo_tbeam_supreme_SX1262/target.h
+++ b/variants/lilygo_tbeam_supreme_SX1262/target.h
@@ -23,5 +23,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/lilygo_tdeck/target.cpp b/variants/lilygo_tdeck/target.cpp
index 50ffa735..731ecfd8 100644
--- a/variants/lilygo_tdeck/target.cpp
+++ b/variants/lilygo_tdeck/target.cpp
@@ -45,7 +45,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tdeck/target.h b/variants/lilygo_tdeck/target.h
index 4640925f..c31d0d0f 100644
--- a/variants/lilygo_tdeck/target.h
+++ b/variants/lilygo_tdeck/target.h
@@ -27,5 +27,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
\ No newline at end of file
diff --git a/variants/lilygo_techo/target.cpp b/variants/lilygo_techo/target.cpp
index 2ebc0641..12d222ff 100644
--- a/variants/lilygo_techo/target.cpp
+++ b/variants/lilygo_techo/target.cpp
@@ -42,7 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_techo/target.h b/variants/lilygo_techo/target.h
index 2b6ed45f..d978d522 100644
--- a/variants/lilygo_techo/target.h
+++ b/variants/lilygo_techo/target.h
@@ -27,5 +27,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_techo_lite/target.cpp b/variants/lilygo_techo_lite/target.cpp
index 6979e347..40a94526 100644
--- a/variants/lilygo_techo_lite/target.cpp
+++ b/variants/lilygo_techo_lite/target.cpp
@@ -41,7 +41,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_techo_lite/target.h b/variants/lilygo_techo_lite/target.h
index 2b6ed45f..d978d522 100644
--- a/variants/lilygo_techo_lite/target.h
+++ b/variants/lilygo_techo_lite/target.h
@@ -27,5 +27,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_tlora_c6/target.cpp b/variants/lilygo_tlora_c6/target.cpp
index e12c58b5..3566fbe4 100644
--- a/variants/lilygo_tlora_c6/target.cpp
+++ b/variants/lilygo_tlora_c6/target.cpp
@@ -38,7 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tlora_c6/target.h b/variants/lilygo_tlora_c6/target.h
index c26d5958..1cb52fbc 100644
--- a/variants/lilygo_tlora_c6/target.h
+++ b/variants/lilygo_tlora_c6/target.h
@@ -16,5 +16,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/lilygo_tlora_v2_1/target.cpp b/variants/lilygo_tlora_v2_1/target.cpp
index 65a78c19..ead62e79 100644
--- a/variants/lilygo_tlora_v2_1/target.cpp
+++ b/variants/lilygo_tlora_v2_1/target.cpp
@@ -39,7 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/lilygo_tlora_v2_1/target.h b/variants/lilygo_tlora_v2_1/target.h
index 326a0dee..cb7d861d 100644
--- a/variants/lilygo_tlora_v2_1/target.h
+++ b/variants/lilygo_tlora_v2_1/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/mesh_pocket/target.cpp b/variants/mesh_pocket/target.cpp
index a7f6c7fb..6fabb317 100644
--- a/variants/mesh_pocket/target.cpp
+++ b/variants/mesh_pocket/target.cpp
@@ -34,7 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/mesh_pocket/target.h b/variants/mesh_pocket/target.h
index 2aa95669..6ab5d9c2 100644
--- a/variants/mesh_pocket/target.h
+++ b/variants/mesh_pocket/target.h
@@ -26,7 +26,7 @@ extern AutoDiscoverRTCClock rtc_clock;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
 
 extern SensorManager sensors;
diff --git a/variants/meshadventurer/target.cpp b/variants/meshadventurer/target.cpp
index 0e3b03f2..0edd4403 100644
--- a/variants/meshadventurer/target.cpp
+++ b/variants/meshadventurer/target.cpp
@@ -41,7 +41,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/meshadventurer/target.h b/variants/meshadventurer/target.h
index 31bc4066..9d1ffca8 100644
--- a/variants/meshadventurer/target.h
+++ b/variants/meshadventurer/target.h
@@ -45,5 +45,5 @@ extern MASensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/meshtiny/target.cpp b/variants/meshtiny/target.cpp
index 5fc60eae..9188db17 100644
--- a/variants/meshtiny/target.cpp
+++ b/variants/meshtiny/target.cpp
@@ -37,7 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/meshtiny/target.h b/variants/meshtiny/target.h
index 8ee3ee86..31f8505d 100644
--- a/variants/meshtiny/target.h
+++ b/variants/meshtiny/target.h
@@ -29,5 +29,5 @@ extern MomentaryButton back_btn;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/minewsemi_me25ls01/target.cpp b/variants/minewsemi_me25ls01/target.cpp
index 13306762..fcec1941 100644
--- a/variants/minewsemi_me25ls01/target.cpp
+++ b/variants/minewsemi_me25ls01/target.cpp
@@ -88,7 +88,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/minewsemi_me25ls01/target.h b/variants/minewsemi_me25ls01/target.h
index a5da5823..ea7383e2 100644
--- a/variants/minewsemi_me25ls01/target.h
+++ b/variants/minewsemi_me25ls01/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/nano_g2_ultra/target.cpp b/variants/nano_g2_ultra/target.cpp
index 81e7744f..aad10c50 100644
--- a/variants/nano_g2_ultra/target.cpp
+++ b/variants/nano_g2_ultra/target.cpp
@@ -36,7 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/nano_g2_ultra/target.h b/variants/nano_g2_ultra/target.h
index 3e58b900..6e354127 100644
--- a/variants/nano_g2_ultra/target.h
+++ b/variants/nano_g2_ultra/target.h
@@ -45,5 +45,5 @@ extern MomentaryButton user_btn;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/nibble_screen_connect/target.cpp b/variants/nibble_screen_connect/target.cpp
index 1980e039..6edaaad7 100644
--- a/variants/nibble_screen_connect/target.cpp
+++ b/variants/nibble_screen_connect/target.cpp
@@ -38,7 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/nibble_screen_connect/target.h b/variants/nibble_screen_connect/target.h
index 66e69901..f31efb8d 100644
--- a/variants/nibble_screen_connect/target.h
+++ b/variants/nibble_screen_connect/target.h
@@ -25,6 +25,6 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
 
diff --git a/variants/promicro/target.cpp b/variants/promicro/target.cpp
index b26320e4..61eab91c 100644
--- a/variants/promicro/target.cpp
+++ b/variants/promicro/target.cpp
@@ -40,7 +40,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/promicro/target.h b/variants/promicro/target.h
index 38c4b4e8..d379927e 100644
--- a/variants/promicro/target.h
+++ b/variants/promicro/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rak11310/target.cpp b/variants/rak11310/target.cpp
index dba5bff2..67432998 100644
--- a/variants/rak11310/target.cpp
+++ b/variants/rak11310/target.cpp
@@ -29,7 +29,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rak11310/target.h b/variants/rak11310/target.h
index fe45c3f2..7c25cd90 100644
--- a/variants/rak11310/target.h
+++ b/variants/rak11310/target.h
@@ -16,5 +16,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rak3112/target.cpp b/variants/rak3112/target.cpp
index 634573b8..6cddfce5 100644
--- a/variants/rak3112/target.cpp
+++ b/variants/rak3112/target.cpp
@@ -50,7 +50,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rak3112/target.h b/variants/rak3112/target.h
index eae90900..e7d85de9 100644
--- a/variants/rak3112/target.h
+++ b/variants/rak3112/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rak3401/target.cpp b/variants/rak3401/target.cpp
index 52f3a3d5..ec4fc28c 100644
--- a/variants/rak3401/target.cpp
+++ b/variants/rak3401/target.cpp
@@ -48,7 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rak3401/target.h b/variants/rak3401/target.h
index 32f17cd1..bb7f5dc4 100644
--- a/variants/rak3401/target.h
+++ b/variants/rak3401/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rak3x72/target.cpp b/variants/rak3x72/target.cpp
index 446783aa..48e7f422 100644
--- a/variants/rak3x72/target.cpp
+++ b/variants/rak3x72/target.cpp
@@ -66,7 +66,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rak3x72/target.h b/variants/rak3x72/target.h
index e0c1441e..3ba1cf42 100644
--- a/variants/rak3x72/target.h
+++ b/variants/rak3x72/target.h
@@ -52,5 +52,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rak4631/target.cpp b/variants/rak4631/target.cpp
index bc7465fd..ea6a2bd4 100644
--- a/variants/rak4631/target.cpp
+++ b/variants/rak4631/target.cpp
@@ -48,7 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rak4631/target.h b/variants/rak4631/target.h
index aa6be664..eeb3e094 100644
--- a/variants/rak4631/target.h
+++ b/variants/rak4631/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rak_wismesh_tag/target.cpp b/variants/rak_wismesh_tag/target.cpp
index 2bd30864..9646375e 100644
--- a/variants/rak_wismesh_tag/target.cpp
+++ b/variants/rak_wismesh_tag/target.cpp
@@ -44,7 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rak_wismesh_tag/target.h b/variants/rak_wismesh_tag/target.h
index 150d0831..a51b3092 100644
--- a/variants/rak_wismesh_tag/target.h
+++ b/variants/rak_wismesh_tag/target.h
@@ -23,5 +23,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/rpi_picow/target.cpp b/variants/rpi_picow/target.cpp
index abb1485d..e3d4bf09 100644
--- a/variants/rpi_picow/target.cpp
+++ b/variants/rpi_picow/target.cpp
@@ -29,7 +29,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/rpi_picow/target.h b/variants/rpi_picow/target.h
index 17dbb35f..706578a4 100644
--- a/variants/rpi_picow/target.h
+++ b/variants/rpi_picow/target.h
@@ -16,5 +16,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/sensecap_indicator-espnow/target.cpp b/variants/sensecap_indicator-espnow/target.cpp
index efdaac61..6674c180 100644
--- a/variants/sensecap_indicator-espnow/target.cpp
+++ b/variants/sensecap_indicator-espnow/target.cpp
@@ -37,7 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   // no-op
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio_driver.setTxPower(dbm);
 }
 
diff --git a/variants/sensecap_indicator-espnow/target.h b/variants/sensecap_indicator-espnow/target.h
index bb78e923..a56dec7b 100644
--- a/variants/sensecap_indicator-espnow/target.h
+++ b/variants/sensecap_indicator-espnow/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/sensecap_solar/target.cpp b/variants/sensecap_solar/target.cpp
index 6bd7d31a..2c2ff0dc 100644
--- a/variants/sensecap_solar/target.cpp
+++ b/variants/sensecap_solar/target.cpp
@@ -29,7 +29,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/sensecap_solar/target.h b/variants/sensecap_solar/target.h
index 90d60ba5..f4a98801 100644
--- a/variants/sensecap_solar/target.h
+++ b/variants/sensecap_solar/target.h
@@ -17,5 +17,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/station_g2/target.cpp b/variants/station_g2/target.cpp
index 3f0c1404..026b25de 100644
--- a/variants/station_g2/target.cpp
+++ b/variants/station_g2/target.cpp
@@ -51,7 +51,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/station_g2/target.h b/variants/station_g2/target.h
index 2bf7016d..01428d58 100644
--- a/variants/station_g2/target.h
+++ b/variants/station_g2/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/t1000-e/target.cpp b/variants/t1000-e/target.cpp
index 82d958b5..da8fa48b 100644
--- a/variants/t1000-e/target.cpp
+++ b/variants/t1000-e/target.cpp
@@ -85,7 +85,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/t1000-e/target.h b/variants/t1000-e/target.h
index 27351b94..d4e3c02c 100644
--- a/variants/t1000-e/target.h
+++ b/variants/t1000-e/target.h
@@ -43,5 +43,5 @@ extern T1000SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/tenstar_c3/target.cpp b/variants/tenstar_c3/target.cpp
index a29780f0..d4f189b5 100644
--- a/variants/tenstar_c3/target.cpp
+++ b/variants/tenstar_c3/target.cpp
@@ -38,7 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/tenstar_c3/target.h b/variants/tenstar_c3/target.h
index fa29e52b..e503564b 100644
--- a/variants/tenstar_c3/target.h
+++ b/variants/tenstar_c3/target.h
@@ -17,5 +17,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/thinknode_m1/target.cpp b/variants/thinknode_m1/target.cpp
index c3b1abc2..ec2438d4 100644
--- a/variants/thinknode_m1/target.cpp
+++ b/variants/thinknode_m1/target.cpp
@@ -35,7 +35,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/thinknode_m1/target.h b/variants/thinknode_m1/target.h
index 8425369d..92661d09 100644
--- a/variants/thinknode_m1/target.h
+++ b/variants/thinknode_m1/target.h
@@ -45,5 +45,5 @@ extern ThinkNodeM1SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/thinknode_m2/target.cpp b/variants/thinknode_m2/target.cpp
index cb3c1624..e7e36d05 100644
--- a/variants/thinknode_m2/target.cpp
+++ b/variants/thinknode_m2/target.cpp
@@ -46,7 +46,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/thinknode_m2/target.h b/variants/thinknode_m2/target.h
index b05def8a..77ebbfde 100644
--- a/variants/thinknode_m2/target.h
+++ b/variants/thinknode_m2/target.h
@@ -26,7 +26,7 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
 
  
\ No newline at end of file
diff --git a/variants/thinknode_m3/target.cpp b/variants/thinknode_m3/target.cpp
index 91d186dc..ca2b0aa0 100644
--- a/variants/thinknode_m3/target.cpp
+++ b/variants/thinknode_m3/target.cpp
@@ -89,7 +89,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/thinknode_m3/target.h b/variants/thinknode_m3/target.h
index 23e99581..4124761c 100644
--- a/variants/thinknode_m3/target.h
+++ b/variants/thinknode_m3/target.h
@@ -25,5 +25,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/thinknode_m5/target.cpp b/variants/thinknode_m5/target.cpp
index 8208d2c4..a7a049ef 100644
--- a/variants/thinknode_m5/target.cpp
+++ b/variants/thinknode_m5/target.cpp
@@ -53,7 +53,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/thinknode_m5/target.h b/variants/thinknode_m5/target.h
index 2af42095..a228cc9f 100644
--- a/variants/thinknode_m5/target.h
+++ b/variants/thinknode_m5/target.h
@@ -29,7 +29,7 @@ extern PCA9557 expander;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
 
  
\ No newline at end of file
diff --git a/variants/thinknode_m6/target.cpp b/variants/thinknode_m6/target.cpp
index c14dd300..36ca8618 100644
--- a/variants/thinknode_m6/target.cpp
+++ b/variants/thinknode_m6/target.cpp
@@ -39,7 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/thinknode_m6/target.h b/variants/thinknode_m6/target.h
index 38b1fed1..fb129988 100644
--- a/variants/thinknode_m6/target.h
+++ b/variants/thinknode_m6/target.h
@@ -27,5 +27,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/tiny_relay/target.cpp b/variants/tiny_relay/target.cpp
index f738ac17..313dfaa9 100644
--- a/variants/tiny_relay/target.cpp
+++ b/variants/tiny_relay/target.cpp
@@ -70,7 +70,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr)
     radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm)
+void radio_set_tx_power(int8_t dbm)
 {
     radio.setOutputPower(dbm);
 }
diff --git a/variants/tiny_relay/target.h b/variants/tiny_relay/target.h
index 82747cdc..d1583712 100644
--- a/variants/tiny_relay/target.h
+++ b/variants/tiny_relay/target.h
@@ -55,5 +55,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/waveshare_rp2040_lora/target.cpp b/variants/waveshare_rp2040_lora/target.cpp
index 7bc1d043..a9121b0c 100644
--- a/variants/waveshare_rp2040_lora/target.cpp
+++ b/variants/waveshare_rp2040_lora/target.cpp
@@ -39,7 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/waveshare_rp2040_lora/target.h b/variants/waveshare_rp2040_lora/target.h
index aed55893..fe1903de 100644
--- a/variants/waveshare_rp2040_lora/target.h
+++ b/variants/waveshare_rp2040_lora/target.h
@@ -17,5 +17,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/wio-e5-dev/target.cpp b/variants/wio-e5-dev/target.cpp
index 42e900e4..3e59b6ce 100644
--- a/variants/wio-e5-dev/target.cpp
+++ b/variants/wio-e5-dev/target.cpp
@@ -63,7 +63,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/wio-e5-dev/target.h b/variants/wio-e5-dev/target.h
index 5fdd0aba..1d1fc5cb 100644
--- a/variants/wio-e5-dev/target.h
+++ b/variants/wio-e5-dev/target.h
@@ -29,5 +29,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/wio-e5-mini/target.cpp b/variants/wio-e5-mini/target.cpp
index 0e2358b8..2e95ad6d 100644
--- a/variants/wio-e5-mini/target.cpp
+++ b/variants/wio-e5-mini/target.cpp
@@ -61,7 +61,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/wio-e5-mini/target.h b/variants/wio-e5-mini/target.h
index 921c38d3..a4e5fb60 100644
--- a/variants/wio-e5-mini/target.h
+++ b/variants/wio-e5-mini/target.h
@@ -60,5 +60,5 @@ extern WIOE5SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/wio-tracker-l1/target.cpp b/variants/wio-tracker-l1/target.cpp
index 64866de0..4575a76c 100644
--- a/variants/wio-tracker-l1/target.cpp
+++ b/variants/wio-tracker-l1/target.cpp
@@ -44,7 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/wio-tracker-l1/target.h b/variants/wio-tracker-l1/target.h
index 97e575d8..e2347647 100644
--- a/variants/wio-tracker-l1/target.h
+++ b/variants/wio-tracker-l1/target.h
@@ -33,5 +33,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/wio_wm1110/target.cpp b/variants/wio_wm1110/target.cpp
index c659d708..457d5bda 100644
--- a/variants/wio_wm1110/target.cpp
+++ b/variants/wio_wm1110/target.cpp
@@ -81,7 +81,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/wio_wm1110/target.h b/variants/wio_wm1110/target.h
index 9bd4a22b..8712a0ef 100644
--- a/variants/wio_wm1110/target.h
+++ b/variants/wio_wm1110/target.h
@@ -16,6 +16,6 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
 
diff --git a/variants/xiao_c3/target.cpp b/variants/xiao_c3/target.cpp
index fe3f7196..f8ee3d92 100644
--- a/variants/xiao_c3/target.cpp
+++ b/variants/xiao_c3/target.cpp
@@ -46,7 +46,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/xiao_c3/target.h b/variants/xiao_c3/target.h
index a7ef4421..57e3b81c 100644
--- a/variants/xiao_c3/target.h
+++ b/variants/xiao_c3/target.h
@@ -16,5 +16,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/xiao_c6/XiaoC6Board.cpp b/variants/xiao_c6/XiaoC6Board.cpp
index 555fed62..5710c4cc 100644
--- a/variants/xiao_c6/XiaoC6Board.cpp
+++ b/variants/xiao_c6/XiaoC6Board.cpp
@@ -39,7 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/xiao_c6/target.h b/variants/xiao_c6/target.h
index 0fbb0bb2..28b46538 100644
--- a/variants/xiao_c6/target.h
+++ b/variants/xiao_c6/target.h
@@ -17,5 +17,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/xiao_nrf52/target.cpp b/variants/xiao_nrf52/target.cpp
index c9c02d21..a8f4162e 100644
--- a/variants/xiao_nrf52/target.cpp
+++ b/variants/xiao_nrf52/target.cpp
@@ -34,7 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/xiao_nrf52/target.h b/variants/xiao_nrf52/target.h
index e1ea2a6b..f4076c34 100644
--- a/variants/xiao_nrf52/target.h
+++ b/variants/xiao_nrf52/target.h
@@ -22,5 +22,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/xiao_rp2040/target.cpp b/variants/xiao_rp2040/target.cpp
index b7c19975..6c9a9143 100644
--- a/variants/xiao_rp2040/target.cpp
+++ b/variants/xiao_rp2040/target.cpp
@@ -39,7 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/xiao_rp2040/target.h b/variants/xiao_rp2040/target.h
index 33b3766c..528c4441 100644
--- a/variants/xiao_rp2040/target.h
+++ b/variants/xiao_rp2040/target.h
@@ -17,5 +17,5 @@ extern SensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
diff --git a/variants/xiao_s3_wio/target.cpp b/variants/xiao_s3_wio/target.cpp
index 26cd27ac..50981ab6 100644
--- a/variants/xiao_s3_wio/target.cpp
+++ b/variants/xiao_s3_wio/target.cpp
@@ -46,7 +46,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setCodingRate(cr);
 }
 
-void radio_set_tx_power(uint8_t dbm) {
+void radio_set_tx_power(int8_t dbm) {
   radio.setOutputPower(dbm);
 }
 
diff --git a/variants/xiao_s3_wio/target.h b/variants/xiao_s3_wio/target.h
index c3227368..fffd1683 100644
--- a/variants/xiao_s3_wio/target.h
+++ b/variants/xiao_s3_wio/target.h
@@ -26,5 +26,5 @@ extern EnvironmentSensorManager sensors;
 bool radio_init();
 uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
-void radio_set_tx_power(uint8_t dbm);
+void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();